A British military court has given a life prison sentence to a marine convicted of killing a man in Afghanistan in 2011.

Sergeant Alexander Blackman was found guilty at a court martial last month of murdering an Afghan man while deployed in southern Helmand province.

The incident was inadvertently filmed on another soldier's helmet camera. Blackman shot the wounded man at close range with a nine-millimeter pistol. In the recording, he acknowledged that he was breaking the Geneva Convention.

The court martial board in Bulford in southwest England on Friday sentenced Blackman to life in prison with a minimum of 10 years behind bars.Two fellow soldiers were acquitted earlier.

The three soldiers were tried anonymously, but on Thursday, judges at the High Court lifted the anonymity order, allowing Blackman to be named.

Britain still has around 6,000 military personnel in Afghanistan, ahead of a full withdrawal by the end of next year.